Pump-operating mechanism



p 1930- w. J. MUNDT PUMP OPERATING MECHANISM Filed June 14. 1928 5' n vc-ntoz Patented Sept. 16, 1930 6 mm: STATES wrnnmman viunmg' on PIERRE, sou'rri: DAKOTA runr-ornnn rine MECHANISM Application filed'lune 14,

The object of this invention is toprovide a' simple, inexpensive and eflicient device whereby. the .work of operating a lift'pump will be lessened and the stroke of the pump 7 rendered even. In lift pumps, especiallyin deep wells, the strokes of the operating mechanism are unequal inasmuch as on the upstroke of the pump rod, the'weight of the rod and the parts mountedthereon as well as the Weight of. the water'must be lifted, whereas on the downstroke or the pump thereis no weightof water to be lifted andthe weight ofthe pump and the attached parts aids in making the stroke; 1 In hand-operated pumps, the operation is consequently very laborious, while inpower-operated pumpsthe supply of power makes the expense out of proportion tothe results,especially in localities where'the water supply is uncertain and is located'at a great depth. "My invention provides simple means wherebythe upstroke of the pump willbe mechanically aided Withf out imposingistrain upon the operator's'o that the up and down strokes of the pump rod will be substantially even. ..The invention is llustrated in the accompanying drawingan'd will be hereinafter fully setforth.

' Inthe drawing:

. Figure 1 is an elevation of a'pump having my improved equalizing mechanism co-n nected therewith; i r

Fig; 2 .is a horizontal section on the line 2-20)? Fig.1,

Fig. 3 is an enlarged detail perspective view of one form of spring hanger;

Fig. 4 is a similar view showing another form of spring hanger, and

Figs. 5 and 6 are detail views showing different forms of pump rod clamps.

The pump illustrated at 1 may be of any approved detail construction and includes a pump rod 3 operated by a hand lever 4, the pump being mounted upon a well curb or platform 2 in the usual manner. In carrying out my invention, there is provided a stand ard 5 which is mounted upon the platform at the side of the pump remote from the handle 4:, and this standard may be of wood or metal a but is preferably constructed of two metal 5 channel bars having their channels disposed 1928. Serial No. 285,473.

outwardly, as will be understood upon reference to Fig. 2. The lower end of the standard isconnected with the platform by a hinge 6 at the side remote from the pump so that when repair of the pump is necessary the standard and the parts mounted thereon may be swung away from the pump to afford accessto all sides of the same, This hinge construction also permits a rocking movement of the standard whereby to accommodate the angular movement of the equalizing lever relative to the pump rod. The equalizing lever 7 extendsbetween the members of the stand ard and is pivotedjthereto adjacentthe upper end of the same, the standard being provided with a plurality of openings 8 to accommodate'the pivotbolt 9 and permit the lever to be set at the proper height to accommodate any desiredpump rod. The shorter arm of I the equalizing lever extends toward the pump rod and has pivoted to its extremity clamping plates 10 which extend at'o'pp'osite side's of the pump rod B and are ffirmly attached thereto by clamping bolts, indicated at 11, inserted through the ends of the clamping plates adja' cent the opposite sides of the pump rod. The longer arm of the equalizing lever extends awayfrom the standard and is provided adj acent its end with a plurality of openings '12 through any one of which may be inserted a bolt 13 to attach a springhanger 14: thereto. This spring hanger, as shown mostclearly in Fig. 3, consists of a plate or web 15 having a foot 16 at its lower end extendinglatera'lly therefrom and terminating in a plurality of upturned lugs or hooks 17 over'which may be engaged eyes at the upper ends of; tension springs 18. 'The lower-ends of the springs are engaged in like manner with "a lower spring hanger 19 which is similar in form to f the upper spring. hanger. but is somewhat longer and provided with a plurality of openings 20 to: accommodate the attaching bolt and provide for adjusting the tension of the springs. Anynumber of springs may be employed and they may be of any slze or strength according to the size of the pump and other working conditions, and it will be understood that by engaging the pivotbolt 13 in a selected opening 12, the force exerted by the equalizing lever may be varied to suit conditions and this adjustment will also serve to regulate the tension of the springs. The lower hanger is secured to the outer end of a supporting arm 21 which has its inner end firmly secured between the members of the standard 5 and a brace 22 has its upper end attached to the outer end of the arm 21 by the same bolt which secures the lower hanger 19' thereto, the lower end of the brace being passed between the members of the standard and adjustably secured therein by a bolt 23 inserted through one of a series of openings 2% in the lower end of the brace.

lVhen the pump rod 3 is forced downward, the attached end of the equalizing lever 7 will, of course, swing downwardly and the outer end of said lever will swing upwardly thereby expanding the springs 18 and increasing the tension of the same. lVhen the ensuing upstroke is imparted to the pump rod, the springs 18 will, of course, contract and will relieve the operator of the lifting strain, the spring being adjusted to' counter-balance or overcome the weight of the load normally raised by the pump. By properly adjusting the brace 22 and the spring hangers, the force of the equalizing lever may be nicely regulated according to the normal load upon the pump and to acquire the desired tension in the springs. The springs tend constantly to assume their contracted condition and, of course, will commence to contract immediately upon the completion of the down-stroke of the pump so that the work of operating the pump will be minimized and the strokes of the pump be uniform.

It may sometimes be more convenient or desirable to employ springs having hooks instead of eyes at their ends and in such event the spring hanger 25 shown in Fig. 4 may be employed. This hanger is of the same form as the hanger shown in Fig. 3, except that the lugs or hooks 17 are omitted and openings 26 are formed through the lateral web of the h anger to be engaged by the books at the ends of the springs.

The clamping plates by which the equalizing lever is connected to the pump rod may be of various forms as may be most desirable under any given circumstances so that the equalizing mechanism may be disposed in the most advantageous angular relation to the pump. The clamping plates shown in Fig. 1 are straight flat plates which will be used when the equalizing mechanism is disposed in the plane of the pump rod and the pump handle. If, for any reason, it becomes necessary to dispose the equalizing mechanism at an angle to the pump rod and the pump handle, clamping plates, such as shown in Fig. 5, may be used. These clamping plates 27 are similar to the clamping plates 10 but have I their end portions disposed in angular relation. It may sometimes be desirable to' employ clamping blocks 28, as shown in Fig. 6. These blocks are provided with recesses 29 in the edge or side presented to the pump rod so that the pump rod may be received therein. It will be understood that whatever form of clamping plate or block is employed they are used in pairs disposed at opposite sides of the pump rod and firmly secured by bolts inserted through openings provided in their ends.

Having thus described the invention, I claim:

1. A pump equalizer comprising a standard, anequalizing lever pivoted directly to the upper portion of the standard, a clamp to be secured to a pump rod and to which one end of the lever is pivoted, an arm secured to and projecting from the standard below the equalizing lever, and tension springs connected with and extending between said arm and the end of the equalizing lever remote from the pump rod.

2. A pump equalizer comprising a standard, an equalizing lever pivoted directly to the upper portion of the standard, a clamp pivoted to one end of said lever and secured around a pump'rod, an arm secured to the standard and projecting therefrom below the lever, hangers carried by the ends of the lever and said arm respectively, and tension springs engaged with and extending between said hangers.

3. A pump equalizer comprising a standard, an equalizing lever pivoted directly to the upper portion of the standard and adjustable vertically thereon, means for attaching one end of the lever to a pump rod, a hanger attached to the opposite endof the lever and adjustable longitudinally thereof, an arm secured to the standard and projecting therefrom below' the lever, a hanger carried by the outer end oisaid arm and ad'- justable across the arm, the hangers having marginal hooks, and tension springs extending between the hangers and having their ends engaged with the hooks thereon.

In testimony whereof I affix my signature.

WILLIAM J. MUNDT. [14. s'.] 

